Hanna Instruments HI-3818 Carbon Dioxide test kit
In nature, lakes and rivers contain carbon dioxide in concentrations smaller than 10 mg/L (or ppm), however, stagnant or contaminated water can contain higher concentrations because of organic decomposition. This creates a problem for fish farming applications.
Carbon Dioxide as CO2 test kit
Carbon dioxide can be measured quickly and safely with the HI 3818 carbon dioxide test kit. This compact, portable kit allows the user the option of field or laboratory use. The design makes the kit easy to handle and, except for the Carbon Dioxide reagent, practically prevents accidental injury or damage due to spills.
Carbon dioxide (as carbonic acid) in the water sample is neutralised with a dilute sodium-hydroxide solution to a pH of 8.3 using a phenolphthalein indicator. This process converts carbonic acid to sodium bicarbonate.
Kit supplied with
10ml phenolphthalein indicator, 120ml carbon dioxide reagent, 10 ml calibrated vessel, 50ml calibrated vessel and calibrated syringe.
This test kits provides approximately 110 tests.
Specifications
| Method | Titration |
| Range | 0.0-10.0 mg/L 0.0-50.0 mg/L 0-100 mg/L |
| Smallest Increment | 0.1 mg/L 0.5 mg/L 1 mg/L |
| Chemical Method | Phenolphthalein |
| Number of Tests | approx. 110 |
| Weight | 460 g |
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Frequently Asked Questions
Clear answers to help you choose the right water testing solution with confidence
Which brands of water testing kits do you supply?
Do you provide kits for both home and professional use?
Yes — whether you’re a pool or spa owner, aquarium keeper, utility company, or a university laboratory, we have the right solution for your needs.
Can I arrange servicing or calibration for my photometer?
Absolutely. We also provide servicing and calibration to keep your photometers accurate and reliable.
How quickly do you dispatch orders?
Orders placed before 2:30 pm (Monday–Friday) are dispatched the same day. We also ship on Saturdays for your convenience.
Which couriers do you use for delivery?
We deliver through UPS, DPD, and Royal Mail. You can also choose to upgrade to next-day delivery at checkout.
What is your return policy?
We accept returns within 14 days of delivery provided the items are unused, in their original packaging, and in resalable condition. Please contact our team before returning any items.
Can I place bulk or business orders?
Yes, we welcome bulk, trade, and institutional orders. For tailored pricing or large quantities, please get in touch with us directly.
How can I get help if I’m unsure which kit to buy?
You can call us at 📞 +44 (0)115888 2726 and our team will guide you in choosing the most suitable kit for your needs.